minor gripe

[Marshall, Simon]

I don't suppose this applies to pretests only, but:

emacs -q
C-x C-f non-existent-file RET
insert something
M-x revert-buffer RET yes RET

gives barf "File non-existent-file no longer exists!"

But it never did!  Maybe if the buffer has never been saved, the message
could be better worded.
Maybe revert-buffer on the File menu shouldn't be enabled (which is how
I accidentally came across it).